After registering the fresh FIR, its 14th in the multi-crore scandal, coordinated searches were carried out by CBI teams at nearly six locations in Mumbai, Delhi, Hyderabad and Bhubaneshwar.
The 46-year-old head of the Aditya Birla group will be called in for questioning, CBI sources said.
The agency has booked Birla as a representative of Aditya Birla Group and his group company, aluminium maker Hindalco, for alleged corruption in the allocation of Talabira two coal blocks in Odisha which was allotted to it on November 10, 2005, the sources said.
"CBI registers a fresh case in alleged irregularities in coal scam against the then Coal Secretary, M/s Hindalco, representative of Adita Birla Group, unknown persons and officials," agency spokesperson Kanchan Prasad said.
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The $40 billion (about Rs. 2.45 lakh crore) conglomerate has denied receiving any FIR and refuted allegations of any wrongdoing.
The CBI action had an immediate fallout with Hindalco shares dropping in the morning by 1.27 per cent. Some of the other Birla companies were also affected.
Parekh, who was Coal Secretary at the time of this allocation, faces charges under the Prevention of Corruption Act as also criminal conspiracy and other offences.